Process of making phosphorus oxychlorid



UNITED STATES PATENT OFFICE.

THOMAS LEES IBARTLESON, OF WIIiMING'ION, DELAWARE, ASSIGNOR TO E. I. DU PONT DE NEMOURS & COMPANY, OF WILMINGTON, DELAWARE, A CORPORATION OF DELA- Patented June 14, 1921.

WARE.

PROCESS OF MAKING PHOSPHORUS OXYCHLOEID.

1,381,783, Specification of Letters Iatent.

11 0 Drawing.

This invention relates to the production of phosphorus oxychlorid, and comprises treating metaphosphoric acid with phosgen at a high temperature.

I have discovered that if phosgen be brought into contact with meta-phosphoric acid at a temperature of, say, between 300 and 400 C. a reaction occurs in accordanc with the .following equation the reaction being readily carried to completion.

The invention may be illustrated by the following example ()rthophosphoric acid was heated until it Application filed October 21, 1920. Serial No. 418,575.

was transformed into metaphosphoric acid and maintained at a temperature of 330- 340 C. Pure )hosgen was then bubbled through the molten acid when phosphorus oxychlorid was formed, distilled off and condensed.

I claim l. The process of producing phosphorus oxychlorid which comprises bringing hosgenlinto contact with molten metaphosp oric acic.

2. The process of producing phosphorus oxychlorid which comprises passing phosgen into molten meta-phosphoric acid at a temperature between about 300 and400 C.

3. The rocess of producing phosphorus oxychlorid which comprises passing phosgen into molten meta-phosphoric acid maintained at a temperature between 330 and 340 C.

In testimony whereof I aiiix my signature. t 5

THOMAS LEES BARTLESON. 

